Support "creation_date" field for StockItem (#823)

Ref: https://github.com/inventree/InvenTree/pull/12011

lib/api.dart

@@ -361,6 +361,10 @@ class InvenTreeAPI {
   // Ref: https://github.com/inventree/InvenTree/pull/11963
   bool get supportsNewUserEndpoints => apiVersion >= 490;
 
+  // Does the server support the "creation_date" field on the StockItem model?
+  // Ref: https://github.com/inventree/InvenTree/pull/12011
+  bool get supportsStockItemCreationDate => apiVersion >= 496;
+
   // Cached list of plugins (refreshed when we connect to the server)
   List<InvenTreePlugin> _plugins = [];
 

lib/inventree/stock.dart

@@ -303,6 +303,11 @@ class InvenTreeStockItem extends InvenTreeModel {
 
   String get expiryDateString => getDateString("expiry_date");
 
+  // Creation date
+  DateTime? get creationDate => getDate("creation_date");
+
+  String get creationDateString => getDateString("creation_date");
+
   // Date of last update
   DateTime? get updatedDate => getDate("updated");
 

lib/widget/stock/stock_detail.dart

@@ -732,6 +732,17 @@ class _StockItemDisplayState extends RefreshableState<StockDetailWidget> {
       );
     }
 
+    if (api.supportsStockItemCreationDate &&
+        widget.item.creationDateString.isNotEmpty) {
+      tiles.add(
+        ListTile(
+          title: Text(L10().creationDate),
+          trailing: LargeText(widget.item.creationDateString),
+          leading: Icon(TablerIcons.calendar_plus),
+        ),
+      );
+    }
+
     // Last update?
     if (widget.item.updatedDateString.isNotEmpty) {
       tiles.add(

lib/widget/stock/stock_list.dart

@@ -50,16 +50,25 @@ class _PaginatedStockItemListState
   String get prefix => "stock_";
 
   @override
-  Map<String, String> get orderingOptions => {
+  Map<String, String> get orderingOptions {
+    Map<String, String> options = {
       "part__name": L10().name,
       "part__IPN": L10().internalPartNumber,
       "stock": L10().quantity,
       "status": L10().status,
       "batch": L10().batchCode,
+      "creation_date": L10().creationDate,
       "updated": L10().lastUpdated,
       "stocktake_date": L10().lastStocktake,
     };
 
+    if (!InvenTreeAPI().supportsStockItemCreationDate) {
+      options.remove("creation_date");
+    }
+
+    return options;
+  }
+
   @override
   Map<String, Map<String, dynamic>> get filterOptions {
     Map<String, Map<String, dynamic>> filters = {